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題名 | 宜蘭縣山坡地校區加勁擋土結構動態分析案例探討=Seismic Response of Geosynthetic Reinforced Soil Retaining Structures in Campuses Built on Slope |
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作者姓名(中文) | 趙紹錚; 周南山; 黃宏謀; 劉家欽; | 書刊名 | 宜蘭大學工程學刊 |
卷期 | 7 2011.12[民100.12] |
頁次 | 頁147-166 |
分類號 | 441.15 |
關鍵詞 | 地工合成材; 加勁擋土結構; 地震; 有限元素法; PLAXIS; Geosynthetic; Reinforced soil retaining structure; Earthquake; FEM; |
語文 | 中文(Chinese) |
中文摘要 | 地工合成材加勁擋土結構由於施工方便,能抵抗較大的差異沈陷,及良好之抗震性能等優點,已逐漸取代傳統重力式擋土牆,成為擋土設施的主流,台灣也大量的使用加勁擋土結構於邊坡穩定案例中。然在921集集大地震時,有許多的結構物遭到破壞,其中也包含加勁擋土結構,因此對於加勁擋土結構於地震下的動態行為,有必要做進一步的了解。本研究以PLAXIS有限元素程式,對宜蘭縣山坡地校區(淡江大學蘭陽校園及佛光大學)加勁擋土結構,分別進行靜態及動態模擬分析,亦即先對加勁擋土結構進行靜態之線彈性分析,進而再以地震加速度記錄資料進行動態模擬分析。本研究以台灣近年來知名的921地震及331地震資料,對宜蘭縣山坡地校區之加勁擋土結構案例進行數值模擬分析,探討其於不同大小地震下之加速度變化,並預測加勁擋土結構於地震時加勁材之受張應力。由本研究結果可以發現,加勁擋土結構於地震時,加勁材所承受之張應力將大於靜態時之張應力。對宜蘭縣山坡地校區加勁擋土結構於兩個大小不同的地震狀態進行分析後,發現不同案例預測所得之加速度變化及加勁材之受張應力趨勢皆不盡相同。因此,為確保加勁擋土結構之整體安定性,建議在加勁擋土結構受震設計時,應針對該加勁擋土結構進行各案分析。 |
英文摘要 | Geosynthetic reinforced soil retaining structures (GRSRS) take over the role of the traditional retaining walls gradually and become the mainstream of the retaining structures because of the advantages of easy construction, being able to bear large differential settlement, seismic resistance ability, etc. A great number of GRSRS in Taiwan have been used to improve the slope stability. However, during the 921 Chi-Chi Earthquake, many buildings and structures, including a few GRSRS, have been destroyed. Therefore, the seismic response of the GRSRS turns out to be a significant research topic and needs more advanced study in detail. This research makes use of the PLAXIS finite element program to simulate the mechanical response of the GRSRS, which were built in the campuses of Foguang University and Tamkang University, under both static condition and dynamic condition. Specifically speaking, the elastic behaviors of the GRSRS are analyzed under static condition first. Following that, the seismic responses of the GRSRS are simulated comprehensively with considering earthquake acceleration records. The main purpose of this research is to predict the dynamic behavior of the GRSRS under earthquakes to understand the acceleration variations and the tensile force distribution of the reinforcement layers. The seismic data of Taiwan earthquakes happened in the recent years, such as the 921 Earthquake and the 331 Earthquake, are employed by taking them as the input data files for the seismic analysis of the GRSRS built in Dan County. The numerical simulations focus on the predictions for the tensile forces of the reinforcements under various earthquake scales. This study observed that the tensile forces of the reinforcement layers under earthquakes bear greater values than those in static condition. On the process of analyzing the GRSRS under different earthquake scales, it is found that the acceleration variations and the tensile force distributions of the reinforcement layers can not be concluded into a regular tendency. As a result, it is recommended that the seismic numerical simulation needs to be carried out for each project during the design analysis in order to guarantee the accuracy of the overall stability of the GRSRS. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。